Multispindle machine.



F. K. NORTH. MULTISPLNDLE MACHINE. APPLICATION man JUNE 3. I916! Patented Dec. 5, 1,916.

4 SHEETSSHEET 2 Invenfor. erick K. North Aflys I Fried F.K.N 0R1H. MULTISPINDLE MACHINE,

APPUCATION FILED JUNE 3,1916.

Patented Dec. -5,' 1916.

4 SHEETS-SHEET 3.

lm lehrorp Frederick K.NorTh I like characters on STATES PATENT onniori,

FREDERICK-K. NORTH, OF BOSTON, MASSACHUSETTS;

MULTISPINDLE MACHINE. 7

Application filed I 1111!; 3, 1916. Serial No. 101,612.

To all whomit may concern:

Be it known that I, FREDERICK K. NORTH,

a citizen of the United States, and resident of Boston, county of Suffolk, State of Massachusetts, have invented an Improvement in Multispindle Machines, of which the following description, in connection with the accompanying :drawing, is a specification the drawing representing like parts.

This invention relates to improvements in metal Working machines of the multi-splndle type in which a -series of spindles for carrying the work or suitable tools are mounted in a rotatable turret and a series of cooperating holders for the tool or for the work are similarly arranged about the same axis, with means for rotating the turret step by step so that each piece of; work ,is successively operated upon by each tool and allof the tools caused to operate upon the work simultaneously.-

Preferably the work is carried by the rotatable spindles as greater accuracy is obtained where the work is ro+ tated than where the tool is rotated relatively to the work since the rotating work always I tends to return to the proper center. I

have therefore illustrated my invention herein as applied to a turret carrying a series of rotatable work carrying spindles.

The principal objects of the invention are to provide a machine of the above type which is capable of increased production and ofgreatcr accurac of operation than has heretofore been effected and in which the wear of the moving parts is reduced to a minimum.

So far 'as I am aware the automatic multispindle machines of the type above referred to'have comprised four rotating spindles and I know of no machine illustrated or de scribed in any printed publication which comprises more than five spindles.

The machine embodying the present invention is so constructed as readily to permit the useof a greater number of spindles, six

' being illustrated in the accompanying drawings,'thus enabling the machlne to produce.

work requiring a greater number of operations or if duplicate tools are used to in.

- crease the amount of production.

erably automatically soperated within the Specification of Letters Patent.

Patented Dec. 5, 191s.

turret, with automatic means carried by certain of the tools for reversing the direction of rotation of the spindle so that in tapping or dieing the proper length of thread is insured.

A further feature of the invention comprises certain improvements in the mecha nisrn for intermittently rotating the turret with means for disengaging the tool actuating mechanism of such a character that the timing of the various parts of the machine will not be disturbed. I

Another object of the invention is to pro vide an oil containing turret in which the rotating spindles and the gearing therefor are submerged, during a part of each rotation of the turret, in a body of oil, thereby maintaining the same in a constant state of lubrication and reducing the wear to a minimum.

Another feature of the invention :com-

prises means for operating the rotating work in improving the simplicity of the design of a multi-spindle machine by eliminating light breakable parts commonly found in .ma-

chines of this character and in providing a I construction in which the parts are .all' of such rigid construction as not to be susceptible to breakage during the ordinary operation of the machine.

In general it may be stated that the main object of the invention is to provide a simple compact machine of great strength-and of improved accuracy in operation.

Other improvements more or less in detail will more'fully appear from the following specification and-the accompanying drawings and will be pointed out in the annexed claims. In the drawings; Figure 1 is'a sectional view on lines l1 Fig. 3, theillustration being made of sectional views taken in somewhat difi'erent planes in order'.-to show' the relative positions of the rotatipg chucks and the tool holders when in cooperating positions. Fig. 2 is a sectional View on line 2-2 Fig. 1 looking toward the left, Fig. 3 is a vertical sectional view on line 3'3 Fig. 1-,

the turret being in a slightly different post actuating means, Fig. l

tion than illustrated in Fig. 1, Fig. 4 is an elevation of the right hand end of the machine shown in Fig. 1, illustrating the indexing mechanism for the turret, Fig. 5 is a similar'elevation'of the left hand or driving end of the machine showing the Geneva stop mechanism for rotating the turret,

illustration of the turret being omitted, Fig.

6 is a transverse view of the turret supporting journal and hub showing the means for supplying fluid under pressure to the chuck is 'a detail longitu dinal sectional view of the same, Fig. 8 is a detail sectional view on lines 8-8 Fig. 3 showing a portion of the hubs of the turret with the braces connectingthe same and the means for actuating the clutch and the reversing cams, and, Fig. 9 is a vertical elevation of the cams illustrated in Fig. 8.

The preferred embodiment of the invention illustrated in the drawing comprises a bed 1 supporting a suitable frame 2, the ends 3 and 4 of which are provided with journals for a cam shaft hereinafter to be described. The superstructure of the lathe which is carried by the frame 2, com rises a tool holding support consisting 0 two preferably substantially cylindrical brackets 5 and 6 whicli are provided centrally with relatively long bosses, 7, 8 forming a journal forthe main shaft 9. At the opposite end the superstructure comprises a bracket 10 having a longitudinal boss 11 forming a third journalfor themain shaft 9.

A bracket 12 secured to the end piece 4 of the frame 2 and having at its upper end a journal 13 provides a convenient -means for su rting a short shaft for the driving pulla isai'd shaft having a gear 15 adapted to mesh with agear 16 upon the main shaft-9 which serves to actuate directly or indirectly all of the movable parts of the machine;

The work supporting turret preferably comprises two circular heads 17, 18 having hubs 19 and 20 which'are rotatablymounted respectively upon the bosses 11 and 8 of the brackets of the su rstructure, said bearings being concentric with the main shaft 9.

The heads 17 and 18 are connected-by strong brackets 21 preferably of the form illustrated in detail in Fig. 8. A sheet metal casing 21 is preferably secured to said heads so that the turret when assembled is in effect a closedcylinder adapted to contain a body ofoil.

The heads. 17 and. 18 are provided with a circular series of journals adapted to re ceive rotatable work holding chucks. These work holding chucks preferably are in the form of sleeves 22 having conoidal recesses 23 at one end to receive the chuck and at the opposite end providedfwith a cupshaped cylinder 24 to receive and fit the. piston 25 which issecured to the'chuck stem 26, means being provided for introducing fluid into the chamber ofthe cup to act upon the piston in the manner hereinafter to be described. The chuck stem 26 is screw threaded at its opposite end and provided with collars Q7, 28 adapted to retain between them the reduced end of separable chuck jaws 30 having conoidal outer surfaces-adapted to coiiperate with the conoidal surface 23 of the sleeve. A spring 31 seated in the recess in the sleeve and bearing against the collar 27 serves normally to thrust the chuck outwardly and release 'the work engaged thereblyz The action of the-fluid pressure upon t 1e tion illustrated herein by providing each.

spindle with two gears driven from the main shaft in opposite directions which have clutch faces adapted alternatively to engage coiiperating faces upon a' clutch member slidably but non-rotatably secured to each spindle.

As illustrated herein, gears 33, 34 are rotatably mounted upon the sleeve 22 adjacent the heads 17 and 18, suitable washers being placed between the gears and heads. The gear 33 is actuatedthrough a gear 35 secured to the main shaft 9 and the gear 34 is actuated through a. gear 36 which is secured to the shaft 9 and engages an intermediate pinion37 preferably mounted upon a shaft 38 secured in the head 18 and which projects beyond said ars for urposes hereinafter to be descrlbed. It wi 1 be. obvious that the gears 33 and 34 will be rotated 'in the opposite direction.

iston 25 serves to move the chuck inwart ly and clamp the same upon the work.

nals forthe gears 33 and 34 is made hexagonal in form and a clutch 39 having an annular groove 40 is provided toembrace this hexagonal portion: The ends of the sleeve 39 preferably are provided with clutch faces to engage corresponding faces upon the adjacent ends of the gears 33 and 34. These clutch faces may. if desired, be

I formed for frictional engagement but preferably are provided with interlocking men1- gage the gear 33 and by thrusting the rod in i the other direction the cluch 29 will be released from' the gear 33 and caused to engage the gear 34 thus causing a .rotation of the spindle in the opposite direction from that in which it is rotated by the gear 33. By this construction not only are the gears inclosed within the protecting casing of the turret but also the clutch mechanism is retained therein and all of these moving parts, are adapted to pass through the body of oil upon each rotation of the turret.

In the operation of machines of this character Where screw cutting is performed it is desirable that means shall be provided for disengaging the clutch instantly when the screw has reached the predetermined length and immediately to cause the reversal of the direction of rotation of the spindle to with draw the tool from the work.

One of the improved features of this invention comprises a means for speeding up the action of theclutch under such circumstances and' in which the clutch will be actuated to reverse the direction of rotation of the-spindle by the action of the tool itself. This is accomplished by providing the yoke 41 with an extension 43 apertured to pass over the extension f the shaft 38. Springs 44 @6145 are provided to bear upon opposite sides of the extension 43 so that the yoke 41 will normally be held in a neutral position out of engagement with either of the gears 83 or 34. Any suitable means may be provided for supporting the outer ends of the springs 4.4, 45, a convenient means illustrated in the accompanying drawing comprises a spider having a hub 46 and radial extensions 47 bifurcated at their ends to receive the ends of the shaft 38 and to provide' a suitable support for the ends of the springs 44-45. In theopera'tion of the machine theclutch controlling rods 42 are actuated by a suitable cam to cause the engagement of the clutch with the proper gear 33 or 34 and the clutch is retained in engagement constantly by said cam. When the re-.

versal is desiredas for example, in tapping or screw cutting the; rod is released from the cam and preferably is shipped in the opposite direction by means carried by the tool which coeperates with the rotatable spindle at that point. This actuation by the tool not only causesthe release of the clutch but the expansion of the spring 44 serves to throw the clutch quickly into engagement with the gear which is rotating in the reverse direc-, tion thereby causing an instant reversal of the direction of rotation of the chuck.

Any suitable mechanism may be utilized for actuating the chuck, preferably however the chuck jaws are opened and closed by fluid pressure mechanism as an air chuck. 'So far as I am aware no air chuck has ever been applied to a machine having rotatable work holding spindles mounted in a rotating turret and I claim broadly the aforesaid combination. As before stated the chuck, stem 26 adapted to be moved longitudinallywithin the spindle sleeve 22 to close the chuck by air pressure within the cup 24, acting against the piston 25 which is secured 1; said chuck stem. Fluid under pressure, preferably air, is introduced into the chamber aforesaid through an axial opening in the chuck stem 26,.a pipe 48 leading therefrom to a hub 19 of the turret and being secured to said hub by suitable screw threaded blocks 49. The boss 11 which extends inwardly from the bracket 10 is provided with an annular air inlet groove 50 extending throughout a portion of the surface but is interrupted to form. an outlet pocket 51 as will more fully hereinafter appear. The air isintroduced into the groove 50 by any suitable compressor through a pipe 52 communicating through a duct 53 in the frame and boss with the annular inlet aperture 50. The pocket 51 communicates.

with a similar duct 54 leading to the atmos 4 phere thus providing an exhaust means for releasing the pressure upon the chuck.

In the operation of the machine the chuck jaws will be closedimmediately when fluid pressure is supplied through the aperture to remove thecompleted work and to chuck a new piece while the rotationof the turret is arrested during one operation of the tools. Any suitable mechanism may be provided for presenting the tools to the work which is held in the rotating spindle. A preferred mechanism howeveriis illustrated in the accompanying drawings which-is. so coiirdiha-ted with the turret and its rotating chucks as to be alwaysin pro-per timedrelation therewith.

- As illustrated in the drawing the tool elders M in, the item f cylind iaal of a cylinder having a sleeve 57 secured to the outer surface thereof. said sleeve being slotted or made up in sections so as to form cam grooves of a contour to give the proper reciprocating movement to each tool. Each tool holder 55 is provided with a sleeve 58 upon which is secured a yoke 59 having extensions or trunnions 60, 61 provided with anti-friction rollers, the extension 60 being adapted to enter a cam slot in the drum and the extension 61 slidably engaging withits roller the walls of a slot 62 in a connecting plate 63 secured at its ends to the heads 6 and 7 'of the tool supporting portion of the superstructure. The sleeve 58 may beadjustably secured to the tool holder and the yoke also may be adjustably clamped upon said sleeve by suitable nuts screwed upon the end of the sleeve aud abutting the ends of the yoke. By reason of this adjustability the tool may be properly positioned in respect to the work.

The cam drum is provided with an'extended hub 64 having secured thereto a gear 65 which is driven from the cam shaft of the machine in a manner hereinafter to be described. I

Vhere one or more of the toolscarried by the tool holders is tobe utilized for tapping or screw threading it is necessary that the chuck shall be stopped and reversed to withdraw the tool. As before stated, this reversal should be practically instantaneous and certain in operation. To this end the v tool holders 55 carrying the taps or dies are provided with extensions or arms 66 adapted to cooperate with the chuck actuating rods 42. As illustrated in Fig. 1 the arm 66 forms a prolongation of the yoke which engages a cam slot in the drum. The arm 66 is bent and is journaled in a boss or bearing in the frame so that it will be caused to reciprocate in parallelism with the tool holders 55*. ,In order further to speed up the actum tion of the clutch mechanism the'end of the arm 66 is provided with a preferably cylin-. -drical cap 67 inclosinga spring 68 intermediate of the innerendof the cap and: the end of the rod 66, said cap being retained upon the end of the arm 66 by a pin and slot connectiom In the operation of the machine the forward movement of the holder 55* will carrying spindles. The

cause the end of the cap 67 to abut against the end of the rod 42 the clutch at that time being in engagement with the gears 34. As the tool 55 progresses the spring 68 is compressed until finally the force of the spring and the pressure of the arm 66 is sutlicient to disengage the clutch from the gear 34. The action thereupon of the spring 44 together with that of the spring 68 is sutiieient to snap the clutch positively into engagement with the gear- 33, whereupon the direction of r otation of the spindle is immediately rerersedand the tapping or screw cutting tool withdrawn. The cam drum of course may be provided with a suitable number of cam slots as may be necessary to give the proper movement to each tool.

,its stationary positions during'the intermittent rotation thereof.

In the preferred embodiment of the invention illustrated in the drawing a counter-- shaft or cum shaft 70 ismounted in the end portions 2, 3 of the frame andalso supported upon an intermediate web 71 having a suitable boss '72 providing a journal for said cam shaft The shaft 70 is driven directly from the main shaft bya beveled goal-'73.

which meshes with "a complementary gear- 74 having a hollow hub 75 rotatably mount- -ed upon a shaft 76; The end'of the hub 4'5 is preferably in the'form of a clutch member 78 adapted detachably t0 a corres xmding clutch member 79 a idablv keyed to an enlarged portion 80 of the shaft 7 6. The clutch 79 may be actuated by any suitable lever mechanism 80" within convenient reach of the operator. The enlarged portion of the shaft 80 is provided with a worm 81 which engages a worm gear 82 upon the counter-shaft 70. The cam shaft 70 drives the drum through a train of gears.

including a gear 83 upon said cam shaft,

an intermediate pinion 8t and the pinion 65 which is secured to the head of the drain:

Intermittent rotation is wand to the turret from the ail? through thellsual'form of Gehcvadop mechaniln, which isilluatrated in Fifl. 1 and 5 of the drawing This mech'anim comprises a plate 85 secured to the hub 19 of the turret. the periphery of said drum provided with radial slots 86 corresponding in number to the number of spindles. A portion "of the periphery of the plate intermediate ofthe slots is cut away in arcuate form to fit the periphery of a disk 87 which is state that as the disk 87 is rotated the pin 89 engaging the slot 86 in the plate 85.w'ill rotate the plate and the turret therewith about the axis of the driving shaft one sixth of a revolution at which time the pin. 89 will leave th slot and the disk will be positively locked from further rotation by the engagement of the 'ppriphery of the disk 87 with an arcuate portion of the edge ofthe disk 85. -While this locking mechanism might ordinarily be sufficient to prevent relativelateral movement of the work supporting chucks of the tool holders, an indexing mechanism is provided whichwill positively'prevent any rotary movement or vibration of .the turret when the spindles and tools are in cotiperating position.

In the preferred embodiment of the invention illustrated in the accompanying drawing the head 18of the turret is provided with a series of recesses 91' (see Fig. 2) which are adapted to be engaged by the end of the pin 92 which is slidably mounted in a bracket 93 secured to the framed the machine. The pin 92 desirably is normally thrust forward by a spring 93 and may be provided with a slot 94 adapted to receive the spherical or cylindrical end of the lever 95 pivotally mounted upon theframe and at its opposite end having an'.-anti-friction roller 96 engaging a cam 97 upon the cam shaft 70. The cam 97 is so constructed as to cause the withdrawal of the pin 92 from looking engagement with the socket 91' at the time the pin 89 on the disk 87 engages the wall of the slot 86 to rotate the turret. The cam 96' is so cut away as to release the end of the lever 95 and permit thespring to throw the pin 92 into engagement with a socket 91 immediately after the pin 89 leaves the slot 86 in the plate'85.

In ,view of the fact that the indexing pin 92 engages directly the head of the turret actuating the same from the cam shaft 70. One of said tools which is illustrated herein comprises a cross-cut tool 100 which is slidably supported upon a bracket 1.01 carried by the web 71 said tool being forced toward the work by a bell crank lever 102 which ispivotally mounted upon a stud shaft 103'- carried y brackets 104 forming a part of or secured to the frame 2, the opposite arm 105 of the bell crank lever engaging a cam 106 fixedly secured upon the cam shaft 70.

Other'cross feeding tools may be mounted in the same or any other suitable manner and actuated either directly or indirectly from the cam shaft ,70 so that the proper timing relation of said tools in respectto the rotating turret may be preserved.

-y providing the clutch mechanism for thecountershaft 7 5 which connects the main shaft to the cam shaft means are provided whereby the rotation of the cam drum. and

consequently theactuation of the tool holders may be stopped instantly at the will of the operator. This is quite essential if the work has not been properly chucked or is found too hard to be machined, and such stoppage 'ofthe drum will not throw'the same out of timing for the reason that the drum is rotated from the camshaft 70 which also actuates the Geneva stop mechanism. Under such conditions the-rotation of the work holding spindles continues and may continue on until the machine is stopped by the usual throwing off of the power.

In the normaloperation of the machine the work holding spindles are driven through the gears 34 which may be driven at a relatively high speed. To accomplish this purpose means are provided for retaining the clutches 39 in engagement with the gear 34 throughout the major part of the rotation of the turret. This is conveniently accomplished by providing a bracket 110 adapted to support a camplate 111 which 13" substantially circular in formjand is provided with a face 112adapte'd to force the ends of the rods 42 forward, or to the right 'as illustrated in- Fig. 1, a suiiicient distanceto maintain the clutch 39 in constant engagement with the'clu tch face of the gear 34. ,Inorder to permit the reversal of the work holding spindles during the tlmlng operations aforesaid one or more portions f the cam plate-111 may he provided With'suitable recesses 113, 114 to permit the movement of the rod 42 in the opposite direction and the shifting of the clutch by the rod 66 which is secured to the holders 5 5 in the manner above described.

In the operation of the machine the work is inserted by the operator In the chuck which is in opened position by reason of the fluid actuating mechanism for sa1d chuck being connected .with the exhaust port.

Ample time is given to the workman for this purpose for the reason that the chuck remains open during one of the operations of the tools upon the work or in other words operative relation to the first tool in the prising a turret having a closed casing series the port of the tube 48 is placed in communication with the fluid supply. which immediately fills the chamber behind the piston 25 and causesthe clutch to;grip

tightly the article to be operated upon. When the work' supporting spindle has reached a position to cooperate with the first tool. the rotation of the turret is stopped and the turret locked from further movement by the operation of the indexing mechanism. The tools are then all advanced by the cam drum 56 or by the cam upon the camshaft 7 0 as the case may be'to perform an operation upon the work. In the meantime another piece of work is chucked into the next succeeding spindle. The operation is then repeated so that thework is operated upon successively by each of the tools infthe series, all of the tools being forced forward simultaneously into engagement with the work by theaction of the cams upon the cam drum or cam shaftn If a piece of work has not been properly chucked or if the same is found to be imperfect or too hard tobe operated upon by one of the tools the advance of the tool may be stopped by throwing out i the clutch members 7 8, 7 9 through the operation of the lever as is usual in machines of this character. I

While the construction herein disclosed illustrates a preferred embodiment of my invention it will be understood that the same may be-embodied in other forms or that equivalent mechanisms may be substituted for certain of the mechanisms herein within the spirit and scope of the following claims it being particularly remembered -that the construction is illustrative and not restrictive as to the features of theinvention which are broadly novel.

Having thus described my invention what I claim as new and de ire to secure by Letters Patent is: r

1. A machine of the class described comprising a turret having a closed casing forming a chamber for a body of lubricant, means forintermittently rotating the same. a plurality of spindles journaled in said turret and means within said turret foractuating saidspindles whereby' thc spindle actuating means will run in lubricant during a portion of each revolution of the turret. 2. A machine of the class described coinorming a chamber for a body of lubricant, means for intermittently rotatingthe same,

; dles arranged in e06 diate of said spindles arranged 'spindle, said spindles and clutch mechanism being adapted to run in lubricant during a portion of each revolution of the tur ret;

3. In a multi-spindle m achine comprising a turret having a closed casing forming a chamber for a body of lubricant, and means for intermittently rotating the same and a 1 plurality of spindles journaled in said turret, gearing within said turret for rotating said 5 'i ridles in'either direction, means for contro ling the direction of rotation of said spindles, and means extending through the end of said turret for actuatin said controlling means, whereby the spindle rrtating means and said controlli means maybe immersed in lubricant during a portion of each revolution-without loss of lubricant fromthe casin 4. In a multi-spindle machine comprising a frame having stands bosses forming journa a driving shaft mounted "in Slld bomes,- a turret mounted upon said and rotatable about the axis of said driv'Efish-ft, a plurality of work carrying spi es journaled in said turret, independent means within said turret operable ,from said driving shaft for rotating said spindles in either direction'and means for controlling the direction of rotation of each spindle.

5. In a multi-spindle machine comprisin a frame having stands 'rovided with alin s, a driving sha mounted in' said bosses, a turret havi a hub mounted on said bosses and rotata leabout the sis of said driving shaft, means for intermittently rotating said turret, a phirality of work carrying spindles journaled in said turret, means for rotating said spindles, tool spinrative relation to said .work carrying spind es and means for reciprocating said tool spindles. 6. In a mult-i-spindle machine comprisin a frame having stands rovided with alin bosses, a driving shait mounted in. said bosses, a turret avin ahub mounted on said bosses and rotatable about the axle of said driving shaft, and means for intermittently rotating the same, 'a plurality of work carrying spindles journaledin'said turret, tw o gears rotatably mounted uponeach of said spindles within said turret, means operated by the driving shaftfor rotatingsaid gears in opposite directions and a clutch shdably "secured to said spindles intermegears. and adapted alternatively to engage either of and gears, tool in operative relation to said work carrying spindles means for regsrovided with alined ciprocating said tool spindles and means oper'ableby the reciprocation of certain of said tool spmdles to cause the shifting of the clutch whereby the direction of rotation of the work carrying spindles will be reversed. 7. In a multi-spindle machine comprising a 'frame, a driving shaft mounted therein, a turret rotatable about the axis of said driving shaft, a plurality of work carrying splndles ournaled'in said turret, two gears mounted rotatably upon .each of said spindles Within said turret, a clutch secured to ing a rotatable turret, a plurality of work said spindles intermediate of said gears and adapted alternatively to engage either of said gears, means operated by saidshaft for rotating said gears in opposite directions whereby the clutch is adapted to cause rotation of the work holding spindle in either direction and resilient means tending normally to restore the clutch to an intermediate neutral position out of engagement with both of said gears.

8. In a multi-spindle machine, a rotatable turret, a series of work' carrying spindles journaled in said turret, a series of tool holders and means for actuating the same, means for intermittently rotating said turret to position said spindles successively in operative relation to each of said tool holders, means for "rotating said spindles in either direction, clutches carried by said spindles adapted alternatively to engage said spindle actuating 'means,' resilient means normally tending to maintain said clutches in neutral ositions, means for forcing said clutches' uring a portion of the revolution of the turret into engagement with said spindle rotating means to cause rotation oi the spindles in one direction, means carried by certain of said tool holders adapted upon the release of said clutch actuating means to force' the clutch into engagement with the oppositely rotating spindle actuating means, the action ofsaid resilient means serving to speed up the shifting of the clutch and the consequent rever-' sal of the spindles. 4

9. In a machine of the class described comprising a spindle, means for rotating the same including a clutch adapted operatively to connect said spindle andsaid spindle rotating means, resilient means adapted normally to force. the clutch into inoperative position and clutch actuating means forforcing said clutch intooperative position against the force of said resilient means tuating means rapid disengagement of the clutch will be efi'ected.

10. In a multi-spindle machine compriscarrying spindles jo-urnaled in said, turret and means for actuating the same, a support having a series of tools mounted to cooperate successively with said work spindles, a cam drum rotatably mounted in walls of slots in said support and thereby to cause longitudinal movement of the tool spindles to prevent rotation of the tool.

11. In a multi-spindle machine comprising a rotatableturret, a plurality of workf' carrying spindlesjournaled in said turret" and means foractuating the same, a support having a series of tools mounted to coopera-te'successively with said work spindles, means adjustably secured to said tool supports having extensions adapted to en- 3 gage respectively the cams on said drum and the walls of slots in said support. 4 12. In. a multi-spindle machine comprising a frame, adriving shaft, a turretrotatably' mounted upon said driving shaft, a plurality of-work carrying spindles j ournaled in said turret, means operable from said drivingw shaft "for rotating said spinf dles, a head having a plurality of non rotatable tool holders, means'for rotating said 99' turret to position the work carrying spindles successively in cooperative relation.

each of said tool holders, a cam drum-mount ed for rotation about the axis of said mam shaft, means on said 'tool holders engaging the cams on said drum whereby said tool holders will bereciprocated in an axial (llrection of the work holding spindles and means for rotating saidcam drum in timed relation to the rotation ofsaid turret,

13. In a multi-spindle machine ompri}. ing a rotatable turret, means for int I'll'lli'h tently rotating the same a predeter ined amount, indexing means for locking said I turret, a plurality of workcarrying spindles 1 5 able tool holders cooperatively arranged inrespect to said; work carrying spindles, means for reciprocatin said tool holders" in the axial direction =0 said spindles and means carried by certain of said tool holders 1 15 adapted to engage said-clutch mechanism to reverse the rotation ofthe work carrying spindle which cooperates with said holder, 1

'14. In a 'multi-spindl machine comp ing a frame, a driving s afit mountedtherc -iiild in, a turret mounted to about the axis of said driving shaft. a lurality of. spinj, dles journaled in said turretgmeans,operable by said driving shaft for rotatin said spin-' dies in either direction inclu ing clutch I25 mechanism fol-controlling the direction-"of rotation of said spindles, acam shaft, means for actuating the same from said driving. shaft, means operated fromthe cam shaft for rotating said turret, a cam drum mounte loed for rotation about the axis of said main shaft, means for actuating said drum from said cam shaft, and a pluralityof toolslides independently operable by said .drumin the axial direction of said tool spindles.

15. ,In a multi-spindle machine comprising a frame, a driving shaft mounted therein a turret rotatably mounted about the axis of said driving shaft, aseries of work supporting spindles journaled in said turret,

means for alternatively-rotating said work carrying spindles in either direction, a su port havin a series of tool holders slidab y' mounted herein and arranged in cooperative relationto said spindles, a drum mounted for rotation about the axis of said driving shaft having cams for actuatin said tool holders, means for rotating sai cam shaft from said main shaft and meansactu- .ated by said cam shaft respectively to rotate the turret intermittently, to index said turret and to'rotate-said tool actuatingdrum whereby the proper timing of the partsis preserved at all times; I

16. In a' multi-spindle machine comprising a frame, a driving shaft mounted therein, a

turret rotatably mounted about the axis of' said driving shaftfa series of work support mg spindles journaled in said turret, means for alternatively rotating saidwork carryingspindles in either direction, a support having a series of toolholders slidably mounted therein and arranged in cooperathe roper timing of the parts is preservedat a 1 times and means for rendering inoperative the means for transmltting rotation from the driving shaft to 'the cam shaft;

17 In a multi-spindle machine comprising a .rotary turret,-a plurality of rotatable spindles journaled in said turret, fluid operated chucks in said spindles including and 'a cylinder inclosin means for automatically introducing fluid 5 under pressure toclose said chucks at a predetermined position during the revolution of said turret and means for releasing said fluid at a different predetermined tion. I 18. In a multi-spindle machine oomprisin a'main frame havir? an extended ourna formingI or a a bearin driving s aft, a turret aving a ead rotatably mounted upon said journal, a plurality of spindles rotatably mounted in said turret, Work carrying chucks mounted in said s indle, fluid operated means for closing sai chucks including a piston connected to said chuck 'aws the. piston, ucts leading from said cylin ers to ports in said hub, a fluid chamber adapted to communicafe with the its in said hub,.means for supplying flui under pressure to said cham ber during a predetermined portion of the revolution of said hub to cause the chuck to grip the work, and an exhaust chamber in said journal in thewpath of the ports in said hub positioned automatically to release the fluid under pressure from the cylinder at a different predetermined portion of the rotation of said turret to permit removal of the work.

. 19. he multi-spindle machine comprising a rotary turret, a plurality of s indles journaled in said turret, said spindles comprising a sleeve and means for rotating the same, a chuck mounted in said sleeve, a rodconnected to said chuck at one end and at its whereof, I have signed my name to this s cification. a REDERICK K. NORTH. 

